I have a new old stock (NOS) u-joint assembly that will fit models K, V, AA, AB, and AC cars (and I suspect 1/2 ton trucks). It is part number 343881. See the pics below.
It does not include a speedometer drive gear, which was pressed onto the shaft of the front yoke. I've been told that you can heat that gear on an old u-joint assembly so you can transfer that gear to the new assembly.
Asking $100 plus shipping from San Leandro, CA. If you want to pick it up or have someone deliver it to you, there won't be a shipping charge. ;-)
Thanks for looking, Dean
Dean 'Rustoholic' Meltz old and ugly is beautiful!